Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2018

Compensation And Retirement Disclosure [Abstract]

Net periodic pension cost

Net periodic pension cost is as follows:

	For the Three Months Ended March 31,
	2018			2017
Interest cost	$	56		$	63
Expected return on assets		(79	)		(74	)
Amortization of net loss		21			24
Net periodic pension cost	$	(2	)	$	13